Siemens SIMATIC S7-1200 - Page 887

Communication
11.2 PROFINET
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
887
Data consistency
The TO_S, CC, SUBJECT, TEXT, ATTACHMENT and MAIL_ADDR_PARAM parameters
are applied by the "TMAIL_C" instruction while it is running, which means that they may only
be changed after the job has been completed (BUSY = 0).
SMTP authentication
Authentication refers here to a procedure for verifying identity, for example, with a password
query.
If you are using the S7-1200 CPU interface, the instruction "TMAIL_C" supports the SMTP
authentication procedure AUTH-LOGIN which is required by most mail servers. For
information about the authentication procedure of your mail server, please refer to your mail
server manual or the website of your Internet service provider.
● Before you can use the AUTH-LOGIN authentication procedure, the "TMAIL_C"
instruction requires the user name with which it is to log on to the mail server. This user
name corresponds to the user name with which you set up a mail account on your mail
server. It is transferred via the UserName parameter to the structure at parameter
MAIL_ADDR_PARAM.
If no user name is specified at the MAIL_ADDR_PARAM parameter, the AUTH-LOGIN
authentication procedure is not used. The e-mail is then sent without authentication.
● To log on, the "TMAIL_C" instruction also requires the associated password. This
password corresponds to the password you specified when you set up your mail account.
It is transferred via the PassWord parameter to the structure at parameter
MAIL_ADDR_PARAM.